U.S. lawsuit was filed against Subway, alleging that it used “deceptive marketing and labeling” to promote its products as healthier than they were.

According to a third version of the complaint, Subway’s tuna products contained chicken, pork and cattle DNA in samples, according to Reuters on Thursday.

The company “duped” customers by implying that its sandwiches were healthier than they are.

According to the news source, on Monday, Karen Dhanowa and Nilima Amin sued Subway for selling tuna sandwiches that they claim violated California law. According to the lawsuit, a marine biologist tested 20 samples of tuna products taken from over a dozen southern California Subway restaurants and found that 19 of them had “no detectable tuna DNA sequences.”

All 20 test samples, according to court documents, contained chicken DNA, 11 items included pork DNA, and seven contained cattle DNA.

A Subway spokesperson rejected the lawsuit, stating in a statement that “the plaintiffs have filed three meritless complaints, each time changing their story.”

“This third, most recent amended claim was only submitted after their previous complaint was rightfully dismissed by a federal judge. Our legal team is currently reviewing the plaintiffs’ amended claim and will file a new motion to dismiss this irresponsible and unlawful lawsuit once we have completed our evaluation.” “The reality is that Subway tuna is genuine and strictly controlled by the FDA in the United States, as well as other government bodies across the world.”

Subway is no stranger to food-related lawsuits, however, its tuna has brought in controversies.

The New York Times reported in June that, after purchasing 60 inches of Subway tuna sandwiches from three separate locations, it could not find any identifiable tuna DNA.

Subway said that DNA testing is not a reliable method to identify denatured proteins, such as Subway’s tuna, which was cooked before it was tested.”

In response, they have set up a website to defend itself from such claims, including a “Tuna facts check.”